Trying to override defaults in Riak chef cookbook for Riak Control user/pass

app.config.erl

[
    {bitcask, [
        {data_root, "/var/lib/riak/bitcask"}
    ]},
    {eleveldb, [
        {data_root, "/var/lib/riak/leveldb"},
        {max_open_files, 50}
    ]},
    {kernel, [
        {inet_dist_listen_max, 7999},
        {inet_dist_listen_min, 6000}
    ]},
    {lager, [
        {crash_log, "/var/log/riak/crash.log"},
        {crash_log_count, 5},
        {crash_log_date, "$D0"},
        {crash_log_msg_size, 65536},
        {crash_log_size, 10485760},
        {error_logger_redirect, true},
        {handlers, [
            {lager_console_backend, info},
            {lager_file_backend, [
                {"/var/log/riak/console.log", info, 10485760, "$D0", 5},
                {"/var/log/riak/error.log", error, 10485760, "$D0", 5}
            ]}
        ]}
    ]},
    {merge_index, [
        {buffer_rollover_size, 1048576},
        {data_root, "/var/lib/riak/merge_index"},
        {data_root_2i, "/var/lib/riak/merge_index_2i"},
        {max_compact_segments, 20}
    ]},
    {riak_control, [
        {admin, true},
        {auth, userlist},
        {enabled, true},
        {userlist, [
            {"user", "pass", "MyUsername", "MyPassword"}
        ]}
    ]},
    {riak_core, [
        {cluster_name, "default"},
        {handoff_port, 8099},
        {http, [{"10.101.6.189", 8098}]},
        {platform_bin_dir, "/usr/sbin"},
        {platform_data_dir, "/var/lib/riak"},
        {platform_etc_dir, "/etc/riak"},
        {platform_lib_dir, "/usr/lib64/riak"},
        {ring_state_dir, "/var/lib/riak/ring"}
    ]},
    {riak_err, [
        {fmt_max_bytes, 65536},
        {term_max_size, 65536}
    ]},
   {riak_kv, [
        {hook_js_vm_count, 2},
        {http_url_encoding, "on"},
        {js_max_vm_mem, 8},
        {js_thread_stack, 16},
        {legacy_keylisting, false},
        {legacy_stats, true},
        {map_js_vm_count, 8},
        {mapred_2i_pipe, true},
        {mapred_name, "mapred"},
        {mapred_queue_dir, "/var/lib/riak/mr_queue"},
        {mapred_system, pipe},
        {multi_backend, [
            {be_default, riak_kv_eleveldb_backend, [
                {data_root, "/var/lib/riak/leveldb"},
                {max_open_files, 50}
            ]},
            {be_blocks, riak_kv_bitcask_backend, [
                {data_root, "/var/lib/riak/bitcask"}
            ]}
        ]},
        {multi_backend_default, be_default},
        {multi_backend_prefix_list, [
            {<<"0b:">>, be_blocks}
        ]},
        {pb_ip, "10.101.6.189"},
        {pb_port, 8087},
        {raw_name, "riak"},
        {reduce_js_vm_count, 6},
        {riak_kv_stat, true},
        {storage_backend, riak_cs_kv_multi_backend},
        {vnode_vclocks, true}
    ]},
    {riak_search, [
        {enabled, false}
    ]},
    {riak_sysmon, [
        {busy_dist_port, true},
        {busy_port, true},
        {gc_ms_limit, 100},
        {heap_word_limit, 40111000},
        {port_limit, 2},
        {process_limit, 30}
    ]},
    {sasl, [
        {errlog_type, error},
        {error_logger_mf_dir, "/var/log/riak/sasl"},
        {error_logger_mf_maxbytes, 10485760},
        {error_logger_mf_maxfiles, 5},
        {sasl_error_logger, false}
    ]}
].
    

riak.rb

name "riak"
override_attributes "riak" => {
  "control" => {
    "enabled" => true,
    "userlist" => { "default_user" => ["MyUsername", "MyPassword"]} 
  }
}
run_list "recipe[riak]"

@atomic-penguin I've created an issue for this problem (see basho/riak-chef-cookbook#51). Do you know how to get rid of the default user?